Owens also admitted two charges of supplying drugs, a further charge of possession of cannabis with intent to supply and also illegal possession of ketamine.

Fabian Gibertoni, 19, of Sheffield, admitted possession of ketamine with intent to supply. Kirsty Wiggins, 24, of Cirencester, also admitted possession of ketamine with intent to supply.

Screen grab from footage of an illegal rave in Twyford Wood, south of Grantham. EMN-150622-102812001

They will be sentenced in July along with three other men who admitted violent disorder at an earlier hearing. They are Oliver Rickman-Williams, 23, of Stroud, Gloucs; Michael Carden, 22, of Brimscombe, Gloucs; and Kieran Wilson, 23, of Hoveton, Norfolk.

Three other defendants face trial after denying charges. Alan Brown, 31, of Bury St Edmunds, Suffolk, denied an offence of public nuisance by providing a generator for use at the rave. Jonathan Lawson, 25, of Norwich, denied two charges of possession of drugs with intent to supply; Stephen Kelly, 26, of Bristol, denied possession of MDMA with intent to supply.

No pleas were taken from four other defendants. Glen More, 23, of Stroud, Gloucs; Benjamin Richardson, 18, of Millfield Road, Metheringham, Lincs; Shea Bruce-Watson, 19, of Glastonbury. Somerset; are all accused of violent disorder. Samuel Stevens, 20, of Chipping Norton, is accused of possessing drugs with intent to supply.

A warrant was issued for the arrest of Alfie Clutterham ,18, of Ashley, Cambs, who failed to appear at court to answer a charge of violent disorder.